- Add license file as documentation

- GNU screen 4.3.1
* This is a bug fix release.
* Visible content get messed up after window resize

- GNU screen 4.3.0:
* Introduce Xx string escape showing the executed command of a window
* Implement dead/zombie window polling, allowing for auto reconnecting
* Allow setting hardstatus on first line
* 'sort' command sorting windows by title
* 'bumpleft', 'bumpright' - manually move windows on window list
* 'collapse' removing numbering 'gaps' between windows, by renumbering
* 'windows' command now accepts arguments for use with querying
- packaging changes:
* move screen-poll-zombies.patch to savannah git
* move screen-4.0.3-ipv6.patch to savannah git
* move sort_command.patch to savannah git
* move xX_string_escape.patch to savannah git
* move screen_enhance_windows_list.patch to savannah git